Oil or acid pump.



W. W. HUDSON.

OIL 0R ACID PUMP.

APPLICATION FILED APR. 28. m7.

Patented Aug. 6, 1918.

INVENTOR flu/c2 3071/ ATTORNEYS 3 SHEETS-SHEET 1.

W. W. HUDSON.

OIL 0R ACID PUMP.

APPLICATION FILED APR. 223, i917- Patented Aug. 6, 1918.

s 1 l I E i 1 i k l h .vl 1 2 INVENTOR WiEZEudaow ATTORNEYS W. W. HUDSON.

OIL 0R ACID PUMP.

APPLICATION FILED APR. 28. 1917.

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-WILLIAM w. HUDSON, or SALT LAKE CITY, UTAH.

OIL 0B ACID PUMP.

Specification of Letters Patent.

Application filed April 28, 1917. Serial No. 165,147.

To all whom it may concern:

Be it known that I, WILLIAM W. Henson, a citizen of the United States, and a resident of Salt Lake City, in the county of Salt Lake and State of Utah, have invented a certain new and useful Improvement in Oil or Acid Pumps, of which the following is a specification.

My present invention relates to improvements in devices for pumping oils or acids, especially those machines which are designed to be used in ore flotation processes, and it consists in the combinations, constructions, and arrangements herein described and claimed. 1

An object of my invention is to provide a device which has a constant stroke, but which may be made to deliver any quantity of liquid from a minimum to the full capacity of the'machine.

A further object of my invention is to provide a device of the type described in.

which the adjustment may be accomplished quickly and accurately, even while the machine is in motion.

A further object of my invention is to provide a device of the type described having few parts, and which is consequently 'not liable to easily get out of order.

Other objects and advantages will appear in the following specification, and the novel features of the invention will be particularly pointed out in the appended claims.

My invention is illustrated in the accompanying drawings forming a part of this specification, and in which:

Figure 1 is a side view of the device;

Fig. 2 is a plan view;

Fig. 3 is a section along the line 3 3 of F ig. 1;

' Fig. 4 is a section along the line 44 of Fig. 1;

Fig. 5 is a longitudinal section through a portion of the device;

Fig. 6 is a detail sectional view of a portion of the device on an enlarged scale;

Fig. 7 is a view somewhat similar to Fig. 6, but showing the parts in a different position;

Fig. 8 is a view similar to Figs. 6 and 7, showing the parts in still another position;

Fig. 9 is a sectional view through the pump cylinder, showingthe pistons in one position, and

Fig. 10 is a view similar to Fig. 9, show-.- i g the pistons in another P0311 101 and an outlet 3. Disposed in this cylinder are two pistons, such as those shown at 4 and 5 respectively, see Fig. 5. The cylinder 4 is connected by means of a rod 6 with a cross head 7 the latter being connected by a rod 8 with a crank shaft 9. Bearings or guides 10 are provided for the shaft 4, and also for the shaft or rod 11, which I will term a stroke control rod. The rod 11 is bolted to a pair of parallel bars 12, these bars being in turn bolted to a rod 13 which terminates at a point marked X, but which is arranged to slide in the bearing 14.

' The bars 12 are provided with a pawl 15 which is pivoted at 16 and which isarranged to engage a lug 17 on a rod 18. The latter is what I may term the auxiliary stroke control-rod. It is slidably disposed in bearings 10 and 14. The rod 18 also bears a milled lug 19 which is arranged to beengaged by a pawl 20 carried by the bars 12,

and which is pivoted at 21. One end of the rod 18 is connected by means of an arm 22 with a rod 23 which passes through the bear-f ing 14 and which is connected with the piston 5.

Slidably disposed on the rod 18 is a nut 24 into which the threaded end of an adjusting rod 25 extends. The latter is provided with a hand wheel 26.

Patented Aug.6,1918. i

From the foregoing description of the various parts of the device, the operation thereof may be readily understood.

Consider 5: This shows the pistons 4 and 5 at the end of a stroke. In this posi- .tion the pawl 15 engages the lug 17 on the rod 18, so that when-the crank shaft 9 is rotated the piston 4 will be moved toward a.

the left in Fig. 5, and the piston 5 will also be moved toward the left through the'connection of the shaft 18 with the rod 23, by means of the arm 22 already described. On reaching the adjustable nut or block 24, the pawl 15 is tripped, 'see Fig. 7, so that it is free from the lug 17. Further movement of the rod 18 is prevented, and the piston 5 is therefore brought to rest. On the continued revolution of the crank shaft the piston 4 goes to the extreme edge of the upper port 2, and then starts back, '5. e.,

toward the right iii Fig. 5. The pawl 20. I

the pawl 20 is tripped by the engagement of the head 2O with the abutment block 27, which raises the pawl and frees it from the lug 19. As long as the piston 4c is in motion pressure is still exerted on piston 5, but the engagement of the nut 28 on the bearing 14 by the nut 29 at the end of the piston 5 prevents further movement of the piston. As the piston 4 approaches the piston 5 the oil is expelled from the space between the two pistons.

Obviously if the pistons 4t and 5 should travel together in the same direction and at the same rate of speed, no liquid would be pumped. llhis can be effected by turning the hand wheel 26 so as to move the nut 24: tov the left in Fig. 1, so far as to prevent the en g-agement of the pawl 15. llhe latter is thus left in engagement with the lug 17, so that the rods 6, 11, 18, and 23 move together,

thus causing the pistons to move together.

N ow, by varying the position of the nut 24 it is obvious that the pawl 15 may be disengaged at any desired time; in other words, to permit the piston l to separate so as to allow a measured quantity of liquid to enter between the two pistons and to be subsequently forced out by the approach of the piston at to the piston 5, as already described. This can be varied so as to make the amount of liquid delivered from a minimum to the full capacity of the pump.

1 claim:

1. An oil or acid pump comprising a cylinder having an inlet and an outlet, a pair of pistons, means for operating one of said pistons, and automatic and positive means out of contact with the other piston for causing it to remain at rest for a predetermined period during the travel of the first named piston in either direction.

2. An acid or oil pump comprising a cylinder having an inlet and an outlet, a pair of pistons, means for causing the travel of the pistons in one direction at the same rate of speed, and automatic and positive means out of contact with both pistons for causing one of said pistons to remain at rest during the continued movement of the other.

3. An oil or acid pump comprising an inlet and an outlet, a pair ofopposed pistons, a cross head having connections between one of sa1d pistons and said cross head for operating the piston, a slidable rod connected to said crosshead, a second slidable rod di osed parallel to said first named slidable ro having connection with said second named piston, and means carried by said first named slidable rod for engaging said second named slidable rod to move said second piston.

4. An oil or acid pump comprising an inlet and an outlet, a pair of opposed pistons, a cross head having connections between one of said pistons and Said cross head for operating the piston, a slidable rod connected to said cross head, a second slidable rod disposed parallel to said first named slidable rod having connection with said second named piston, and a pair of pawls carried by said first named slidable rod for engaging said second named slidable rod to move said second piston.

5. An oil or acid pump comprising an inlet and an outlet, a pair of opposed pistons, a cross head having connections between one of said pistons and said cross head for operating the piston, aslidable rod connected to said cross head, a second slidable rod disposed parallel to said first named slidable rod having connection with said second named piston, and a pair of pawls carried by said first named slidable rod for engaging said second named slidable rod to move said second piston, and means for disconnecting one of said pawls from said second named rod at any predetermined tlme.

6. An oil or acid pump comprising an inlet and an outlet, a pair of opposed pistons, a cross head having connections between one of said pistonsand said cross head for operating the piston, a slidable rod connected to said cross head, a second slidable rod disposed parallel to said first named slidable rod having connection with said second named piston, and means carried by said first named slidable rod for engaging said second named slidable rod to move said second piston, and a block slidable on said second named rod and arranged to engage one of said pawls for releasing the latter from the second named'rod.

7. An oil or acid pump comprising an inlet and an outlet, a pair of opposed pistons a cross head having connections between one of said pistons and said cross head for operating the piston, a slidable rod connected to said cross head, a second slidable rod disposed parallel to said first named slidable rod having connection with said second named piston, means carried by said first named slidable rod for engaging said second named slidable rod to move said second piston, a block slidable on said second named rod and arranged to engage one of said pawls for releasing the latter from the second named rod, and means including a hand wheel for regulating the position ofthe block with respect to said pawl.

8. An oil or acid pump comprising an inlet and an outlet, a pair of opposed pistons, a. cross head having connections be tween one of said pistons and said cross head for operating the piston, a slidable rod connected to said cross head, a second slidable rod disposed parallel to said first named slidable rod having connection with said second named piston, means carried by said fi st named slidable rod for engaging said second named slidable rod to move said second piston, a block slidable on said second named rod and arranged to engage one of said pawls for releasing the latter from the second named rod, means including a hand wheel for regulating the position of the block with respect to said pawl, and a stationary abutment arranged to engage the other pawl for releasing it from said second named rod.

9. An oil or acid pump comprising a cylinder having an inlet and an outlet, a pair of pistons, means for positively actuating one of said pistons to cause the latter to reciprocate, means connected with the firstnamed actuating means for reciprocating the second-named piston in the same direction with the first, and means for disconnecting said second-named piston from the actuating means during the movement of, the first-named piston.

10. An oil or acid pump comprising a cylinder having an inlet and an outlet, a pair of pistons, means for positively actuating one of said pistons to cause the latter to reciprocate, means connected with the firstnamed actuating means forreciprocating the second-named piston in the same direction with the first, and automatic means for disconnecting said second-named piston from the actuating means during the movement of the first-named piston, at any point of the stroke of the first-named piston. I

11. An oil or acid pump comprising a cylinder having an inlet and an outlet, a

pair of pistons, means for positively actuating one of sald pistons to cause the latter to reciprocate, means connected with the first-named actuating means for reciprocating the second-named piston in the same direction with the first, automatic means for disconnecting said second-named piston from the actuating means during the movement of the first-named piston, at any point of the stroke of the first-named piston, and means acting subsequent to said disconnection for positively holding said secondnamed piston at rest during a discharge of the liquid.

' WILLIAM W. HUDSON.

Witnesses:

. LAVID Wmcox, F. L. PADGETL 

